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Through the Microscope: Blood Cells - Life's Blood
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Infectious mononucleosis
Infectious mononucleosis is caused by the Epstein-Barr virus, a DNA herpes-type virus that infects B lymphocytes. Patients present with mild to severe adenopathy, hepatosplenomegaly, fever, malaise, pharyngitis, and a characteristic peripheral blood smear demonstrating reactive lymphocytes.